Method and system for maintaining current data for wireless devices

ABSTRACT

A system is disclosed. The system includes a server to receive a request representing changes to data residing at a device. The request is received from the device that is coupled to the server. The server includes a first synchronizer to identify the changes via web services description. The server further includes a second synchronizer to synchronize the identified changes with the data at the device to update the data at the device.

FIELD

This invention relates generally to the field of network data services.More particularly, the invention relates to a method and system formaintaining current data for wireless devices.

BACKGROUND

A variety of wireless data processing devices have been introduced overthe past several years. These include wireless personal digitalassistants (“PDAs”) such as the Treo 650 handheld, cellular phonesequipped with data processing capabilities (e.g., those which includewireless application protocol (“WAP”) support), and, more recently,wireless messaging devices.

With the rise in the use of wireless devices, having the data ofinterest on such wireless devices as current as possible is becomingincreasingly important; yet it is cumbersome. For example, theconventional way of updating data on the wireless device requires alldata be synchronized and the changes be made directly to the database.Such changes to the database require the wireless device to be online.Furthermore, changes, such as triggers, procedure calls, queries, etc.,being applied directly to the database can cause to destabilize thesystem (e.g., server) which could be problematic to mission criticalsystems. The problem is further exasperated with the amount of data tobe updated is relatively large, such as when dealing with enterprisebusiness data.

SUMMARY

In one embodiment, a system is disclosed for maintaining current datafor wireless devices. The system includes a server to receive a requestrepresenting changes to data residing at a device. The request isreceived from the device that is coupled to the server over a wirelessnetwork. The server includes a first synchronizer to identify thechanges via web services description. The first synchronizer includes abusiness record synchronizer. The server further includes a secondsynchronizer to download the identified changes to the device to updatethe data at the device. The downloading of the changes includessynchronizing the identified changes with the data at the device toupdate the existing data at the device.

In another embodiment, a method for is disclosed. The method includesreceiving a request from a device. The request representing changes todata residing at the device. The method further includes identifying thechanges via web services description, and synchronizing the identifiedchanges with the data at the device to update data at the device.

BRIEF DESCRIPTION OF THE DRAWINGS

A better understanding of the present invention can be obtained from thefollowing detailed description in conjunction with the followingdrawings, in which:

FIG. 1 illustrates an embodiment of a network to implement elements ofthe present invention;

FIG. 2 illustrates an embodiment of an architecture for maintainingcurrent data for wireless devices;

FIG. 3 illustrates an embodiment of an internal structure of businessrecord synchronizer;

FIG. 4 illustrates a processing for downloading and uploading of datachanges; and

FIG. 5 illustrates an embodiment of a computer system.

DETAILED DESCRIPTION

According to one embodiment a mechanism for monitoring a connection to awireless device is disclosed. In the following description, for thepurposes of explanation, numerous specific details are set forth inorder to provide a thorough understanding of the present invention. Itwill be apparent, however, to one skilled in the art that the presentinvention may be practiced without some of these specific details. Inother instances, well-known structures and devices are shown in blockdiagram form to avoid obscuring the underlying principles of the presentinvention.

Reference in the specification to “one embodiment” or “an embodiment”means that a particular feature, structure, or characteristic describedin connection with the embodiment is included in at least one embodimentof the invention. The appearances of the phrase “in one embodiment” invarious places in the specification are not necessarily all referring tothe same embodiment.

FIG. 1 illustrates one embodiment of a network architecture. A “customersite” 120 is illustrated in FIG. 1 and may be any local-area orwide-area network over which a plurality of servers 103 and clients 110communicate. For example, customer site 120 may include all servers andclients maintained by a single corporation.

Servers 103 may provide a variety of different messaging and groupwareservices 102 to network users (e.g., e-mail, instant messaging,calendaring, etc). However, the underlying principles of the inventionare not limited to any particular messaging/groupware platform.

In one embodiment, an interface 100 forwards data objects (e.g., e-mailmessages, instant messages, calendar data, etc.) maintained by service102 to a plurality of wireless data processing devices (represented inFIG. 1 by device 130) via an external data network 170 and/or a wirelessservice provider network 171. For example, server 103 serves as a proxyfor the web service that delivers data on a wireless network to variousmobile devices 130.

In one embodiment, interface 100 is a software module adapted to workwith the particular service 102. It should be noted, however, thatinterface 100 may be implemented in hardware or any combination ofhardware and software while still complying with the underlyingprinciples of the invention.

In one embodiment, the external data network 170 includes a plurality ofdatabases, servers/clients (not shown) and other networking hardware(e.g., routers, hubs, etc) for transmitting data between the interface100 and the devices 130. In one embodiment, the interface 100encapsulates data in one or more packets having an address identifyingthe devices 130 (e.g., such as a 32-bit Mobitex Access Number (“MAN#”)).

The external data network 170 transmits the packets to a wirelessservice provider network 171, which in turn, transmits the packets (orthe data contained therein) over a wireless communication link to thedevice 130. In one embodiment, the wireless service provider network isa CDMA 2000 network. However, various other network types may beemployed (e.g., Mobitex, GPRS, PCS, etc.) while still complying with theunderlying principles of the invention.

It should be noted that the network service provider network 171 and theexternal data network 170 (and associated interface 100) may beowned/operated by the same organization or, alternatively, theowner/operator of the external data network 170 may lease wirelessservices from the wireless service provider network. The underlyingprinciples of the invention are not limited to any particular servicearrangement.

FIG. 2 illustrates an embodiment of an architecture for maintainingcurrent data for wireless devices 202. In the illustrated embodiment, awireless processing device (device) 202 is coupled to and incommunication with server 204. Device 202 includes any device having amobile computer systems or devices, such as a laptop computer, a mobiletelephone (e.g., mobile cellular phones, smartphones, etc.), a personaldigital assistant (PDA), a pocket computer, etc. Server 204 is furtherin communication with an enterprise server (enterprise server) 220providing web services. It is contemplated that server 204 and anenterprise web services server (WS server) 220 are in communication witheach other via a network. Device 202, which can be online or offline,and server 204 are in communication with backend WS server 220 viaexposed web services and a web services application. The network mayinclude a local area network (LAN), a wide area network (WAN), ametropolitan area network (MAN), an internet, the Intranet, and thelike. Further, the network is coupled to and in communication with awireless network. Server 204 may include GoodLink™ server, Good AccessWeb Services (GAWS) server, etc., provided by Good Technology, Inc. ofSanta Clara, Calif. Examples of WS server 220 include Web ApplicationServer developed by SAP AG of Walldorf, Germany, and WebSphereApplication Server developed by International Business Machines Corp.(IBM®) of Armonk, N.Y.

In one embodiment, server 204 includes subscription manager 210, webservices (WS manager) 212, business record synchronizer (business recordsync) 214, and data synchronizer (data sync) 216. Data sync 216 includesa generic data synchronizer. Subscription manager 210 is used to manageweb services query subscriptions associated with devices 202. Forexample, subscription manager 210 is used for polling of object data viadefined query web service operation. Each query subscription uses a webservices call, with arguments, that identifies a group of business data.For example, there can a query that defines a group of high-prioritysales accounts. Further, multiple query subscriptions can share the sameweb service method call with different arguments. Also, in anapplication, multiple query subscriptions can be defined for each userand/or device 202. Stated differently, several groups of businessrecords per used can be employed.

WS manager 212 handles web service requests and responses (includingauthentications when making requests) on behalf of device 202. Uponreceiving a command (e.g., a periodically triggered command) by thesubscription manager 210, WS manager 212 makes an invocation to the webservice, retrieves business records, and updates business record sync214. Business record sync 214 manages the knowledge of recordidentification and sync state, including any overlapping redundancy ofrecords, for each device 202. Business record sync 214 employs data sync216 which directly tracks and syncs data on devices 202. Business recordsync 214 is used for managing business record identification and changesfor subscriptions, which data sync 216 employs database 206 to track andsynchronize any data with the device 202.

A user can make changes to data on device 202 either when device 202 isonline or offline. The changes can include amending and/or deleting ofexisting data and/or adding of new data to the existing data. Thechanges are then recognized at server 204 and are synced by data sync216 to database 206 for that particular device 202. A server processthen invokes the Extensible Markup Language (XML) and Simple ObjectAccess Protocol (SOAP) web services change (e.g., update, deletion,addition, creation, etc.) operations with the user changes at serverdatabase 206 as the appropriate XML web service playloads. For example,an administrator or developer can identify a web services changeoperation during a setup process for that web service using data manager214 at server 204. These changes will eventually propagate back tobusiness record sync 214 and its cache 208 when the subscription manager210 runs.

Using web services, business operations available in an XML web serviceas described by the Web Services Description Language (WSDL) 224 at WSserver 220 which contains data description/metadata, necessary businesslogic is obtained that is typically wrapped around such businessoperations. Web services provide operations, as described by WSDL 224,used by WS manager 212. These operations as described by WSDL 224 mayinclude query, create, update, and delete operations, collectivelyreferred to as QCUD operations. Query is to be presented to thatsubscription manager 210 can query data periodically, while create,update, and delete operations are regarded optional. Further, these webservices QCUD operations may be implemented via a web services interface222.

In one embodiment, changes are then reported and made to database 206and later synchronized with device 202 via synchronizer 216 at server204. This mechanism may be referred to as downloading of data changes.Downloading of data changes to device 202 via data sync 216 may be donewith device 202 is online or disconnected. Database 206 includes datacorresponding to multiple devices 202, while cache 208 includes datacorresponding to a single device 202. As such, even an occasionallydisconnected device 202 can stay current with frequently changing datafrom backend applications that are exposed via web services via WSserver 220.

In one embodiment, the existing data that has been changed in WS server220. Subscription manager 210 periodically uses WS manager 212 to queryweb services for data. The response contains records as described byWSDL 224, and these records are identified and extracted from theresponse using a predefined record boundary XML Path (XPath). XPathrefers to a sublanguage in an Extensible Stylesheet Language (XSL) stylesheet that is used to identify XML elements for processing. It is alsoused to calculate numbers and manipulate strings. The record primary keyor unique identifier is also identified by XPath if possible. Otherwise,the primary key is calculated as a hash of the record content. Therecords are then passed on to the business record sync 214 to berecognized which have been changed for the given device 202. Using thecache 208, business record sync 214 can detect what the device 202currently has and what have changed. Business record sync 214 uses datasync 216 to download the latest changes to device 202.

In one embodiment, data changes are then synchronized with device 202using data sync 216 at server 204, resulting in downloading of datachanges to device 202. As with uploading, merely data changes aredownloaded, eliminating the need for downloading all the data to device202. This mechanism allows device 202 to continue to maintain current orupdated data. This is accomplished without having to tie up deviceprocessor and bandwidth with continuous processing of large XML queryresponses from backend web services as merely data changes are uploadedand downloaded, eliminating both large full data updated and smallincremental changes which are time consuming and delayed. Moreover,server 204 and its components (e.g., subscription manager 210, WSmanager 212, business record sync 214, data sync 216, etc.) are used tokeep the data current and updated at device 202 using merely thearbitrary enterprise data without having the need for customprogramming.

FIG. 3 illustrates an embodiment of an internal structure of businessrecord sync 214. As illustrated, business record sync 214 is incommunication with cache 208, data sync 216, and database 206. Data sync216 includes generic data sync 312 in communication with data syncnetwork 314, data sync storage 316 at database 206, and record manager302 at business record sync 214. Cache 208 includes business recordcache 318 in communication with business record sync 214. There may be asingle business record cache 318 assigned for each device.

WS business record 306, extracted from web services response, representsa record as it appears or is stored on a wireless device, representing apiece of enterprise data (e.g., account data, product data, customerdata, contacts and notes, etc.). A key similar to a primary key in adatabase is regarded and each row in database can be a recordrepresenting a business record. The key identifying a WS business record306 is extracted from a web services query subscription. It can beidentified by an xpath in web services response as configured by theadministrator. If not configured, it can be a hash of the content of theWS business record 306. The key can be used to index WS business record306.

Cache 208 is used for caching of business records 306 such that theknowledge of which data is new, updated, or deleted for a given deviceor user can be maintained, such as by comparing the existing data todata changes, changes in cache data can be determined. Further, thecaching of business records 306 provides a temporary repository ofbusiness records 306 and helps achieve better performance. Businessrecord cache 318 is loaded as necessitated (e.g., lazy instantiation).Also, those business records 306 that are not used for a while (asdetermined by the administrator) can be purged to save memory. Further,no-content proxy records representing those that are alreadysynchronized can also be stored at cache 208, which may eliminate theneed for purging business records 306 from business record cache 318.

Users via corresponding devices can register a query specification withbusiness record group association 304 through subscription manager toidentify a group of WS business records 306 of interest. Record groupassociation 304 can be used to help avoid replicating record data withineach cache 208 associated with the device by determining which group aparticular record 306 belongs to or is associated with. Subscriptionmanager can be used to manage various groups for each device. Aninterface is employed and used for updating record group association 304of groups to records 306.

For each user space, WS business record key map 308 maintains abi-directional one-to-one mapping between a record key and itsassociated data identification (dataID) at the data sync 216. Themapping also persists in a permanent storage and loaded up at startuptime. In one embodiment, record group association 304, record cache 310,and WS record key map 308 may not be exposed outside of the recordmanager package.

As startup or initialization, in one embodiment, record manager 302 isaware of which records 306 are stored at each device. Also, atinitialization, not all content available at generic data sync 312 areto be loaded. For example, the following activities may stay hidden orbe avoided: (1) loading of the mapping between each synchronizer dataIDand record key for each device; (2) loading of any records that startup,but do not demand loading by relying on the dataID-key mapping to helplazy load from synchronizer. A hybrid scheme may be employed to have newor updated record's content kept in memory until it is written tosynchronizer; and (3) record group associations 304 can be created ondemand. For instance, record manager 302 may work on the assumption thatif any of WS business records 306 that are not part of the user's querysubscription can be removed from synchronizer, while the dataID-keymapping is accordingly disassociated. Although, record manager 302 maynot directly remove any record 306 from web services.

In terms of operations, WS business records 306 may be replicated acrosswireless devices as the information in memory may be kept on the basisof each corresponding device. Such replication of records 306 can allowfor a simpler implementation and synchronization of records 306 and helpavoid potential conflicts. Record manager 302 may support the followingoperation scenarios: (1) create (e.g., creating and/or allocating ofdataID and further creating of WS business record 306 as identified bythe dataID); (2) read (e.g., accessing the latest version of a record306 for a given device; (3) update (e.g., allowing a record 306 to beupdated); and (4) group update (e.g., updating an entire group of WSbusiness records 306). Record manager 302 may or may not explicitlysupport the delete operation of record 306. For example, using businessrecord group association 310, the appropriate WS record 306 may beidentified for purging from synchronizer. Further, individual recordcreation or update may leave the record 306 associated with anun-subscribed system group to avoid its automatic deletion. The record306 can then be automatically transferred to a user-defined group when agroup update (e.g., UpdateGroup()) method identifies such record 306belonging to a group at record group association 310.

In one embodiment, for each subscription, subscription manager (e.g.,subscription manager 210 of FIG. 2) may use WS manager (212 of FIG. 2)to invoke a registered query web services call. The result may then betranslated into a group of records by WS manager and a group updateoperation is then issued to the record manager 302. Through record groupassociation 310, record manager 302 maintains a mapping for each WSbusiness record 306 in one or more groups. Record cache 318 for a givendevice may transparently maintain one or more of following states foreach record 306 when a group is updated: (1) new (e.g., a record 306 isnew to server); (2) updated (e.g., content of the changed record 306 isdifferent from what was stored at cache 208); (3) deleted (e.g., recordmanager 302 determines that a record 306 does not belong in any groupthat associates with the device; and (4) in synchronization (e.g.,IN_SYNC, which refers to business record 306 being already synched withdevice).

When implementing, in one embodiment, once a group update is issued, aperiodical or immediate update of synchronizer can be performed. Whenperforming lazy load for cache, a determination is made as to whether arecord is new or not by consulting WS record key map 308 which canindicate whether device or cache has previously known about this record.If device has already had a particular record, the record is loaded andcompared to help decide whether the record is new, same, or updated. Ifthe record is the same, it can be inserted into cache with the IN_SYNCstate; otherwise, the record is updated and later sent to device.

A record group may be automatically created when calling a group updatewith a new group identification (e.g., groupID) as described elsewherein this document. Any subsequent update to the same groupID canautomatically trigger an update to device as needed or desired. Toremove a group, a call to group update with no records may be sufficientto trigger a removal of data on device. Record manager 302 may serve onbehalf of synchronizer for create, read, and update operations for anyWS business record 306. As illustrated, record manager 302 may usevarious components 306-310 and their operations to help perform itsfunctions.

For data changes representing an update, record sync 214 is updatedright away. Record sync 214 also provides asynchronous create and updateoperations. For data changes representing a delete, however, record sync214 may not be updated right away because the device may have multiplequery subscriptions, which means any record 306, which is createdindependently from any group, may be in another subscription that hasyet to be created. Thus, for example, a delayed garbage collection forpicking up records for delete operations may be employed, and any record306 not associated with a group may be deleted right away.

Although record sync 214 may not depend on implementation of record keygeneration, a single standard implementation may be used for server forconsistency. A number of parameters can be used for record keygeneration, such as type (e.g., type=Account) and key content (e.g., keycontent=<AccountID>34534097345</AccountID>) can be employed or singleimplementation combining the type and key content can be used (e.g.,key=Account: 34534097345). Further, since the record content isavailable, a hash code may be created based on the entire content askey. Thus, a change in the record content may result in purge of the oldrecord in favor of a new record or effectively, having an add/deleteoperation pair in synchronizer. Also, a hash code may be generated withcreating a key, including one on the actual user-defined key content andthe other one on the record content. This mechanism allows having asimple key-map database, while maintaining the same effect andefficiency. To have a reasonable key size, the developer/administratormay choose to define the key.

WS business record key map 308 may maintain association between a recordkey and its associated dataID for each device via a WS record key mapinterface 320. WS record key map 308 is persisted and loaded atinitialization. Synchronizer helps maintain this mapping transparentlyand make the appropriate addition and deletion consistent with theactual data in Synchronizer. The size of record key map 308 can bedetermined using a formula based on the map size per server using, forexample, number devices, average user-defined key size, hash-based keysize, average records kept per device, dataID size per map entry, andthe like. Further, this mechanism may be flexible enough such that itcan be seamlessly altered due to changing requirements or goals withouteffecting performance levels. Also, a database that is compatible andintegratable with server may be used. WS business record 306 includes aninterface 322 to provide access to records. Interfaces are also providedfor access to other components, such as interface 324 at generic datasync 312 and interface 326 at data sync storage 316.

FIG. 4 illustrates a process for downloading and uploading of datachanges. At processing block 402, data changes or request for datachanges are accepted at server. Data changes are initiated at a wirelessprocessing device by a user and are transmitted over to server over anetwork. In one embodiment, a request for data changes is received atserver. The request for data changes may be triggered with the userattempting to make changes to the existing data at the device. Therequest received at server represents data changes requested by the uservia device. Data changes are then individually identified at server atprocessing block 404. Identification may include identifying each recordby its individual key, using description or metadata contained in WSDL,and using web service queries. Identification may include identifyingthe type of change (e.g., addition, deletion, amendment, creation, etc.)made to existing data. For example, whether new data was created andadded to existing data and/or changes were made to existing data. Thesechanges may be represented as QCUD operations (e.g., query, create,update, and delete operations) that are provided by web services anddescribed by WSDL at web services server. These QCUD operations are thenused by WS manager at server. Data changes may then be stored at servercache.

Identification also includes determining whether there are any conflictsin data changes that are not to be resolved at server at decision block406. Conflicts may include data changes that cannot be reconciled withthe other data changes and/or existing data residing at one or more ofserver cache, server database, and/or device. If such a conflict exists,it may be downloaded on to device for manual reconciliation withexisting data at device at processing block 412. For example, conflictsmay include variation in data (e.g., records) due to one or more ofinappropriate changes, incorrect changes, unacceptable changes,unrecognized changes, and untimely changes (e.g., making changes to apiece of data that does not exist, making changes that are unacceptabledue to system limitations, etc.). For example, users A and B requestdifferent changes to a common set of existing data (e.g., the samerecord or set of records accessible by both user A and B) by accessingdevices A and B, respectively.

Let's suppose, device A then stays offline for the next 2 hours becauseuser A is flying from Denver to Los Angeles, while device B stays onlineand in use by user B. For clarity, assuming there are no othercomplications or requests placed, in this case, data changes proposed byuser B are likely to be accepted at server and downloaded to device B.Device A, instead, receives a conflict or conflict notification. User Amay then choose to merge the changes onto device A, overwrite user B'sdata changes with the previously proposed change or a new change, orsimply enter the changes from device B manually at device A.

Referring back to decision block 406, if there are not conflicts, in oneembodiment, data changes are uploaded 408. Uploading of data changes mayinclude reconciling data changes with web service server in light ofQCUD operations provided by web services and as described by WSDL. Datachanges being reconciled with or uploaded to web services server arerepresentative of merely the changes proposed to the existing data atdevice such that there is no need for uploading all data. Data changesare then reconciled and stored at server database. In one embodiment, asingle server cache may be assigned to or correspond with a singlewireless device and may contain data that resides at the correspondingdevice. Server database, in one embodiment, may correspond to several orall wireless devices that are in communication with server and maycontain data representing collective data residing at all such devices.

In one embodiment, data changes are then downloaded at processing block410. Downloading of data changes to device can be performed while deviceis online, offline, connected, or disconnected. Downloading includessynchronizing data changes with the existing data at device such thatthe existing data is updated and current. Synchronization of datachanges with device is performed using data synchronizer, as datachanges are communicated to it by record synchronizer. Furthermore,proposed data change to device, acceptance of data changes,identification of data changes, determination of conflicts, uploading ofdata changes, storing of data changes at cache and database, anddownloading of conflicts may also be performed while device is online,offline, connected, or disconnected. For example, a request for datachanges can be placed by the user via a device when the device isonline, but the downloading or synchronization of such data changes withthe device may occur while the device is offline or disconnected.Similarly, conflicts can be manually resolved by the user once thedevice comes online, but, prior to that, conflicts can be communicatedto the device while the device is offline or disconnected.

FIG. 5 illustrates a computer system 500 on which device 130 and orserver 103 may be implemented. Computer system 500 includes a system bus520 for communicating information, and a processor 510 coupled to bus520 for processing information. According to one embodiment, processor510 is implemented using one of the multitudes of Motorola ARM family ofprocessors of microprocessors. Nevertheless one of ordinary skill in theart will appreciate that other processors may be used.

Computer system 500 further comprises a random access memory (RAM) orother dynamic storage device 525 (referred to herein as main memory),coupled to bus 520 for storing information and instructions to beexecuted by processor 510. Main memory 525 also may be used for storingtemporary variables or other intermediate information during executionof instructions by processor 510. Computer system 500 also may include aread only memory (ROM) and/or other static storage device 526 coupled tobus 520 for storing static information and instructions used byprocessor 510.

A data storage device 525 such as a magnetic disk or optical disc andits corresponding drive may also be coupled to computer system 500 forstoring information and instructions. Computer system 500 can also becoupled to a second I/O bus 550 via an I/O interface 530. A plurality ofI/O devices may be coupled to I/O bus 550, including a display device524; an input device (e.g., an alphanumeric input device 523 and/or acursor control device 522).

The communication device 521 is for accessing other computers (serversor clients) via network 170. The communication device 521 may comprise amodem, a network interface card, or other well-known interface device,such as those used for coupling to Ethernet, token ring, or other typesof networks.

Embodiments of the invention may include various steps as set forthabove. The steps may be embodied in machine-executable instructions. Theinstructions can be used to cause a general-purpose or special-purposeprocessor to perform certain steps. Alternatively, these steps may beperformed by specific hardware components that contain hardwired logicfor performing the steps, or by any combination of programmed computercomponents and custom hardware components.

Elements of the present invention may also be provided as amachine-readable medium for storing the machine-executable instructions.The machine-readable medium may include, but is not limited to, floppydiskettes, optical disks, CD-ROMs, and magneto-optical disks, ROMs,RAMs, EPROMs, EEPROMs, magnetic or optical cards, propagation media orother type of media/machine-readable medium suitable for storingelectronic instructions. For example, the present invention may bedownloaded as a computer program which may be transferred from a remotecomputer (e.g., a server) to a requesting computer (e.g., a client) byway of data signals embodied in a carrier wave or other propagationmedium via a communication link (e.g., a modem or network connection).

Throughout the foregoing description, for the purposes of explanation,numerous specific details were set forth in order to provide a thoroughunderstanding of the invention. It will be apparent, however, to oneskilled in the art that the invention may be practiced without some ofthese specific details. For example, while illustrated as an interface100 to a service 102 executed on a server 103 (see FIG. 1); it will beappreciated that the underlying principles of the invention may beimplemented on a single client in which the client transmits data over anetwork. Accordingly, the scope and spirit of the invention should bejudged in terms of the claims which follow.

1. A system, comprising: a device having data; and a server to receive arequest from the device, the request representing changes to the data,the server including a first synchronizer to identify the changes viaweb services description, and a second synchronizer to synchronize theidentified changes with the data at the device to update the data. 2.The system of claim 1, wherein the first synchronizer comprises a recordsynchronizer, and the second synchronizer comprises a data synchronizer.3. The system of claim 1, wherein the web services description isprovided via Web Services Description Language (WSDL) residing at a webservices server, the web services server coupled with the server over anetwork.
 4. The system of claim 3, wherein the web services descriptioncontains information to facilitate the identification of the changes,the information further describing operations representing the changesto be performed to the data.
 5. The system of claim 4, wherein theoperations comprise one or more of query operation, create operation,update operation, and delete operation, wherein the operations areimplemented via a web services interface.
 6. The system of claim 1,wherein the first synchronizer is further to track the changes, and tocommunicate the changes to the second synchronizer to download thechanges to the device, the downloading of the changes includes thesynchronization of the changes with the data at the device.
 7. Thesystem of claim 6, wherein the first synchronizer is further to manageone or more of changes identification and changes synchronization stateat one or more of cache and database.
 8. The system of claim 1, whereinthe server further comprising a subscription manager to manage webservices query subscriptions of the device, to facilitate polling ofobject data via a defined query operation, and to periodically query forrecords via a web services manager at the server.
 9. The system of claim8, wherein the web services manager is to provide the records asdescribed by the WSDL to the subscription manager, wherein the recordsare identified and extracted via a predefined record boundary.
 10. Thesystem of claim 9, wherein the web services manager if further to uploadthe changes to the web services server, the uploading of the changesincluding synchronizing the changes with the web services server and thefirst synchronizer.
 11. The system of claim 9, wherein the web servicesmanager is further to invocating the web services server, retrieving thedata, updating the first synchronizer, and managing web servicesrequests and responses between the server and the web services server onbehalf of the device.
 12. A method, comprising: receiving a request froma device having data, the request representing changes to the data;identifying the changes via web services description; and synchronizingthe identified changes with the data at the device to update the data.13. The method of claim 12, wherein the identifying of the changes isperformed via a first synchronizer including a record synchronizer, andthe synchronizing of the identified changes is performed via a secondsynchronizer including a data synchronizer.
 14. The method of claim 12,wherein the web services description is provided via Web ServicesDescription Language (WSDL) residing at a web services server, the webservices server coupled with the server over a network.
 15. The methodof claim 14, wherein the web services description contains informationto facilitate the identification of the changes, the information furtherdescribing operations representing the changes to be performed to thedata.
 16. The method of claim 12, further comprising uploading thechanges to the web services server via a web services manager, theuploading of the changes including synchronizing the changes with theweb services server and the first synchronizer.
 17. A machine readablemedium having stored thereon data representing sets of instructionswhich, when executed by a machine, cause the machine to: receive arequest from a device having data, the request representing changes tothe data; identify the changes via web services description; andsynchronize the identified changes with the data at the device to updatethe data.
 18. The machine-readable medium of claim 17, wherein the webservices description is provided via Web Services Description Language(WSDL) residing at a web services server, the web services servercoupled with the server over a network.
 19. The machine-readable mediumof claim 17, wherein the sets of instructions which, when executed bythe machine, further cause the machine to track the changes via a firstsynchronizer, and the first synchronizer to communicate the changes to asecond synchronizer to download the changes to the device, thedownloading of the changes includes the synchronization of the changeswith the data at the device.
 20. The machine-readable medium of claim17, wherein the sets of instructions which, when executed by themachine, further cause the machine to upload the changes to the webservices server via a web services manager, the uploading of the changesincluding synchronizing the changes with the web services server and thefirst synchronizer.